1. Which kind of evidence did scientists use to determine that some animals moved back to a marine life after first evolving as land mammals? a. The fossil record
b. Comparison of homologous structures
c. DNA evidence
d. All of the above

Instead of gathering evidence from a single field, the pair pulled together research from many disciplines, including paleontology, molecular biology and conservation ecology, to give a far larger picture of what was happening when animals transitioned from the land to the sea across millennia.

Explanation:

it's probably D. all of the above because scientists use all of these examples

but im not 100% sure

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

answer; i believe the correct answer is (sporophyte);